Don't let Don fool you, he did plenty of talking during my meeting with Rael and Tim O'Reilly on Friday. We talked a lot about different ways to use RSS, both for blogs and other sites. Much of the conversation focused on RSS clients. The basic readers we have today are fine for browsing blogs, but what about organizing and filtering content from multiple feeds? There isn't a lot of client-side support for transforming metadata included in a feed into an alternate format, or merging data from feeds for searching, sorting, or presenting information. You can do all those things if you consume the feeds yourself, but most readers (at least the one's I've been using) don't support features like this. There is definitely a lot of interesting work to be done here!